Results 91 to 100 of about 1,935 (190)

Impacts of a sudden stratospheric warming on the mesospheric metal layers [PDF]

, 2017
We report measurements of atomic sodium, iron and temperature in the mesosphere and lower thermosphere (MLT) made by ground-based lidars at the ALOMAR observatory (69°N, 16°E) during a major sudden stratospheric warming (SSW) event that occurred in ...
Baldwin, Baumgarten, Bernd Kaifler, Bifford P. Williams, Bones, Butler, Chau, Christiansen, Damiani, Daniel R. Marsh, Dawkins, Dunker, Feng, Feng, Flury, Garcia, Gardner, Gardner, Goncharenko, Gómez Martín, Holt, Huang, Huang, Höffner, John M.C. Plane, Josef Höffner, Kirchhoff, Lamarque, Langowski, Liu, Liu, Manney, Manney, Marsh, Marsh, McInturff, Neuber, O'Callaghan, Plane, Plane, Plane, Rose, She, Singer, Ulf-Peter Hoppe, Viehl, Vignon, Vincent, Wuhu Feng, Xu, Yamashita, Yamazaki, Yu, Yuan   +53 more
core   +3 more sources

Benchmarking the Dynamic Modes of Stratosphere‐Troposphere Coupling in Northern Annular Modes (NAM) in CMIP6 Models

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The downward influence of extreme stratospheric events is typically described by the evolution of the Northern Annular Mode (NAM) across atmospheric levels. However, the dynamics and uncertainty in vertical coupling are not fully resolved. By applying the linear inverse model (LIM) to daily, multi‐level NAM indices from reanalysis and CMIP6 ...
Gang Chen, Xiuyuan Ding
wiley   +1 more source

Sensitivity of the Brewer-Dobson circulation and polar vortex variability to parameterized nonorographic gravity wave drag in a high-resolution atmospheric model [PDF]

, 2018
The role of parametrized nonorographic gravity wave drag (NOGWD) and its seasonal interaction with the resolved wave drag in the stratosphere has been extensively studied in low-resolution (coarser than 1.9 x 2.5 degrees) climate models but is ...
Andrews D. G., I. Polichtchouk, P. Bechtold, R. J. Hogan, T. G. Shepherd   +4 more
core   +1 more source

Weather and Climate Extremes: Simplex, Dynamical Systems and Hull Clustering

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.
Abstract A novel method is developed and applied to identify high‐dimensional weather and climate extremes located on the envelope of the data set within its state space. The method is based on formulating and integrating dynamical systems whose attractive set, that is, stable fixed points, is constituted of extreme states residing on the convex hull ...
A. Hannachi, K. Finke, N. Trendafilov, D. Monselesan, J. Risbey, C. Chapman, L. Chafik   +6 more
wiley   +1 more source

The Evolution of the Stratopause During the 2006 Major Warming: Satellite Data and Assimilated Meteorological Analyses [PDF]

, 2008
Microwave Limb Sounder and Sounding of the Atmosphere with Broadband Emission Radiometry data show the polar stratopause, usually higher than and separated from that at midlatitudes, dropping from
Daffer, William H., Krueger, Kirstin, Livesey, Nathaniel J., Manney, Gloria L., Minschwaner, Ken, Mlynczak, Martin G., Pawson, Steven, Remsberg, Ellis E., Russell, James M., III, Schwartz, Michael J., Waters, Joe W.   +10 more
core   +2 more sources

Response of the Migrating Solar Semidiurnal Tide to Arctic and Antarctic Stratospheric Polar Vortices: A Comprehensive Study

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 3, 16 February 2026.
Abstract In this study, we use the Specified Dynamics Whole Atmosphere Community Climate Model with thermosphere‐ionosphere eXtension (SD‐WACCM‐X) to investigate how the migrating solar semidiurnal tide (SW2) in the mesosphere and lower thermosphere (MLT) responds to the strength of Arctic and Antarctic Stratospheric Polar Vortices (SPVs).
Sunil Kumar, Jens Oberheide, Xian Lu
wiley   +1 more source

Observation of vertical coupling during a major sudden stratospheric warming by ICON and GOLD: a case study of the 2020/2021 warming event

Frontiers in Astronomy and Space Sciences
The response of the thermospheric daytime longitudinally averaged zonal and meridional winds and neutral temperature to the 2020/2021 major sudden stratospheric warming (SSW) is studied at low-to middle latitudes (0◦ - 40◦N) using observations by NASA’s ...
Erdal Yiğit, Ayden L. Gann, Alexander S. Medvedev, Federico Gasperini, Qian Wu, Qian Wu, Md Nazmus Sakib   +6 more
doaj   +1 more source

Weakening of the stratospheric polar vortex by Arctic sea-ice loss [PDF]

Successive cold winters of severely low temperatures in recent years have had critical social and economic impacts on the mid-latitude continents in the Northern Hemisphere.
Jeong, JH, Kim, BM, Kim, SJ, Min, SK, Shim, T, Son, SW, Yoon, JH, Zhang, XD   +7 more
core   +1 more source

The role of synoptic eddies in the tropospheric response to stratospheric variability [PDF]

, 2013
The tropospheric response to sudden stratospheric warmings (SSWs) is analyzed in an idealized model setup regarding the respective roles of planetary-scale and synoptic-scale waves. The control model run includes a full interactive wave spectrum, while a
Chen, Gang, Domeisen, Daniela I.V., Sun, Lantao   +2 more
core   +1 more source

Prediction of European Winter 2023/24: Influence of a Strong El Niño

Atmospheric Science Letters, Volume 27, Issue 2, February 2026.
The UK winter seasonal outlook for 2023/24 gave good guidance with increased chances of mild, wet and windy conditions, particularly in early winter, which verified well when compared with observations. December was particularly stormy. Our analysis suggests the key driver was the well forecast, strong El Niño event, with the late winter European ...
Sarah Ineson, Chris Almond, Paul Davies, Nick J. Dunstone, Chris K. Folland, Margaret Gordon, Steven C. Hardiman, Jeff R. Knight, Peter McLean, Yu Nie, Adam A. Scaife, Doug M. Smith, Nicky Stringer, Hazel E. Thornton, Brent Walker   +14 more
wiley   +1 more source